Installation of the Blocker Door Latches [CFMB]

TASK 78-31-19-400-001-A
Installation of the Blocker Door Latches

FIN: 3002KM1 ** ON A/C NOT FOR ALL
FIN: 3002KM2 ** ON A/C NOT FOR ALL
FIN: 3002KM3 ** ON A/C NOT FOR ALL
FIN: 3002KM4 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 70 and 61 lbf.in (0.79 and 0.69 m.daN )
No specific	Torque wrench: range to between 150 and 130 lbf.in (1.70 and 1.47 m.daN )
No specific	Torque wrench: range to between 300 and 260 lbf.in (3.39 and 2.94 m.daN )
HIX3005	1	SAFETY SLEEVE - PIVOTING DOOR ACTUATOR

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2245)	finish paint EA4 blue 5991
(Material No.CP2318)	blindexite RT 342-2
(Material No.CP8001)	lockwire 0.032 in. (0.8 mm) dia.
(Material No.CP8002)	lockwire 0.032 in. (0.8 mm) dia

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
10	PREFORMED PACKINGS	AIPC 78-31-19-01-030

E. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 78-30-00-081-041-B	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-30-00-710-040-B	Thrust Reverser Hydraulic System Bleed Procedure
TASK 78-32-41-080-001-A	Removal of the Safety Sleeve from Blocker Door Actuator
TASK 78-32-41-480-001-A	Installation of the Safety Sleeve on Blocker Door Actuator
TASK 78-32-41-860-001-A	Manual Deployment of the Blocker Door
TASK 78-32-41-860-002-A	Manual Stowing of the Blocker Door
Hydraulic Lines of the Left Blocker Door Latches
Hydraulic Lines of the Blocker Door Latches
Blocker Door Latches
Thermal Blankets of the Blocker Door Latches

3. Job Set-up
Subtask 78-31-19-860-054-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position on the right side of engine.
(4) Make sure that the blocker door are deployed (Ref. AMM TASK 78-32-41-860-001).

Subtask 78-31-19-010-057-A ** ON A/C NOT FOR ALL

B. Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 78-31-19-040-053-A ** ON A/C NOT FOR ALL

C. Make sure that the thrust reverser is unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 78-31-19-480-056-A ** ON A/C NOT FOR ALL

D. Make sure that the HIX3005 SAFETY SLEEVE - PIVOTING DOOR ACTUATOR is on the blocker door actuator (Ref. AMM TASK 78-32-41-480-001).

4. Procedure

WARNING: WEAR A FACE SHIELD WHICH IS RESISTANT TO HIGH PRESSURE JETS WHEN YOU WORK ON PRESSURIZED SYSTEMS.

WARNING: DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:

FLUSH IT AWAY WITH CLEAN WATER
GET MEDICAL AID.

CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:

ONE WRENCH TO HOLD THE UNION, AND
ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.

THIS PREVENTS DAMAGE TO THE PARTS.

Subtask 78-31-19-420-050-B ** ON A/C NOT FOR ALL

CAUTION: DO NOT PUSH ON THE STOW SWITCH LEVER WHEN BLOCKER DOOR IS OPENED OR DAMAGE COULD OCCUR.

A. Installation of the Blocker Door Latches

NOTE: You should apply a witness line of finish paint EA4 blue 5991 (Material No.CP2245) on all nuts and connections when you have checked their torques.

(1) Remove the protective covers from the hydraulic tubes and the blanking plugs from the holes in the blocker door latch (15).
(2) Lubricate the packings and install them on the unions (20).

CAUTION: MAKE SURE THERE IS NO UNWANTED MATERIAL IN THE PORTS AND ORIFICES OR DAMAGE CAN OCCUR.

CAUTION: YOU MUST LUBRICATE UNIONS AND HYDRAULIC TUBES WITH HYDRAULIC FLUID BEFORE INSTALLATION.

(a) Lubricate the AIPC 78-31-19-01-030 PREFORMED PACKINGS (10) with hydraulic fluid and install them on the unions (20).
(b) Install the unions (20) on the blocker door latch (15).
(c) TORQUE the unions to between 300 and 260 lbf.in (3.39 and 2.94 m.daN )

.
(3) Apply a layer of blindexite RT 342-2 (Material No.CP2318) on the door latch surface in contact with the forward frame.
(4) Install the nearest bolt from the V-head ring segment in the pivoting door latch.
(5) Engage the blocker door latch in the forward frame.
(6) Install the bolts (25) and the nuts (5).
(7) TORQUE the nuts (5) to between 70 and 61 lbf.in (0.79 and 0.69 m.daN )

.
(8) Connect the supply and return tubes to the blocker door latch (15).
(a) TORQUE the coupling nuts of the supply and return tubes to between 150 and 130 lbf.in (1.70 and 1.47 m.daN )

.
(9) Installation of the Thermal Blankets on the Blocker Door Latch

Thermal Blankets of the Blocker Door Latches ** ON A/C NOT FOR ALL

(a) Put the thermal blanket (35) in place on the blocker door latch (15).
(b) Put the thermal blanket (30) in place on the other side of the blocker door latch (15).
(c) Wind the strap on blanket (30) around the blanket (35).
(d) Make sure the two thermal blankets (30) and (35) fully touch the blocker door latch (15).
(e) Tie the two blankets (30) and (35) together using CP8001lockwire 0.032 in. (0.8 mm) dia. or CP8002lockwire 0.032 in. (0.8 mm) dia.
(f) Put the thermal blanket (40) on the blocker door latch (15). It should cover the blankets (30) and (35).
(g) Turn the Dzus fastener on the blanket (40) 1/4 turn to lock it.

5. Close-up
Subtask 78-31-19-080-050-A ** ON A/C NOT FOR ALL

A. Remove the safety sleeve (HIX3005) from the blocker door actuator (Ref. AMM TASK 78-32-41-080-001).

Subtask 78-31-19-860-050-A ** ON A/C NOT FOR ALL

B. Moving of the blocker doors

CAUTION: BLOCKER DOOR LATCH MUST BE OPENED WHEN YOU CLOSE THE BLOCKER DOOR OR DAMAGE CAN OCCUR.

(1) Manually move the blocker doors to the closed position (Ref. AMM TASK 78-32-41-860-002).

Subtask 78-31-19-440-050-A ** ON A/C NOT FOR ALL

C. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041).

Subtask 78-31-19-410-050-A ** ON A/C NOT FOR ALL

D. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

Subtask 78-31-19-710-050-A ** ON A/C NOT FOR ALL

E. Bleed the air from the thrust reverser hydraulic system (Ref. AMM TASK 78-30-00-710-040).

[Rev.10 from 2021] 2026.04.01 03:24:18 UTC